Google for calculators giving you your metabolic rate in rest - it depends on your gender, age, weight, height aso. Than add your activity level being a factor: 1.2 for very few activity, 1.375 for easy activity 1-3 times a week, 1.55 for moderate activity 3-5 times a week and 1.725 for intense activity 6-7 times a week (intense is not like walking the dog or even doing an intense workout in here!). This is what what you should consume for not gaining! Then try to get below this number and keep an eye on your nutrition (low on fat,...